Question

an equivalent expression by distributing the \-\ sign outside the parentheses:
-(8.9d + 10f) + 6.4

Explanation:

Step1: Distribute the negative sign

To distribute the negative sign outside the parentheses, we multiply each term inside the parentheses by -1. So, $-(8.9d + 10f)$ becomes $-1\times8.9d + (-1)\times10f$.
$$-(8.9d + 10f) = -8.9d - 10f$$

Step2: Combine with the remaining term

Now we have the expression $-8.9d - 10f + 6.4$ after combining the distributed terms with the $+6.4$ from the original expression.

Answer:

$-8.9d - 10f + 6.4$